Hundreds of black Canadians confront British troops attempting to deport Solomon Moseby, an escaped slave from Kentucky, back to the United States. Slavery is illegal in the British Empire, so slaves who reach Upper Canada are supposed to be safe, but U.S. authorities have demanded that Moseby be deported back to the U.S. because he stole a horse from the slaveowner in order to escape. When news of the planned deportation becomes known in late August, blacks encircle the jail in Niagara-on-the-Lake in Upper Canada in order to prevent his removal. When the authorities make their move on September 12, the crowd attacks the troops guarding Moseby and enable him to escape. Two people are killed by the soldiers in the melee, and 40 are arrested.